import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue';
import Home from '../components/Home';
import Welcome from '../components/Welcome'
import Users from '../components/user/Users'




Vue.use(VueRouter)

const routes = [{
    path: '/',
    redirect: '/login'
  },
  {
    path: '/login',
    component: Login
  }, {
    path: '/home',
    redirect: '/welcome',
    component: Home,
    children: [{
        path: '/welcome',
        component: Welcome
      },
      {
        path: '/users',
        component: Users
      }
    ]
  }
]

const router = new VueRouter({
  routes
})

// 全局守卫 （防止未登录直接访问home）
router.beforeEach((to, from, next) => {
  // to 代表访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数，表示放行   next('/login)
  if (to.path === '/login') return next();

  // 获取token
  const tokenStr = window.sessionStorage.getItem('token');
  if (!tokenStr) return next('/login')
  next()

})


export default router